Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 460 RA 1)1 ATA : FIG. 691. iner thej lay their eggs; and in the autumn they per- ish. At length the eggs hatch, and the little planulce, as the newly-hatched Jelly-fishes are called, swim about in the water by means of little appendages calle/,1 vibratile cilia. Soon each becomes attached to a rock, shell, or sea- weed, and is then called Scyphistownct (Fig. 691). Then the body begins to divide by horizontal constrictions, and soon ap- pears as in Figs. 692, 693, and is then Scyphistoma called
Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 460 RA 1)1 ATA : FIG. 691. iner thej lay their eggs; and in the autumn they per- ish. At length the eggs hatch, and the little planulce, as the newly-hatched Jelly-fishes are called, swim about in the water by means of little appendages calle/,1 vibratile cilia. Soon each becomes attached to a rock, shell, or sea- weed, and is then called Scyphistownct (Fig. 691). Then the body begins to divide by horizontal constrictions, and soon ap- pears as in Figs. 692, 693, and is then Scyphistoma called Strobila. At length the segments become more and more separated, and the upper- most one drops off; then the next one ; then the next, and so on, till each in turn has separated from the one be- low itself. dula, Per. and LeS. Magnified about seven diameters. FIG. 692. FIG. 693.
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